Arachnoid
# Arachnoid

Arachnoid may refer to:

* Relating to arachnids
* Arachnoid (astrogeology), a geological structure found only on the planet Venus
* Arachnoid (botany), referring to organs with a cobwebby exterior appearance
* Arachnoid granulation, small protrusions of the arachnoid mater
* Arachnoid mater, a layer of the meninges, membranes that contain the central nervous system
